<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Vue中列表过渡</title>  
    <script src="./vue.js"></script>
    <style>
        .v-enter,.v-leave-to{
            opacity: 0;
        }
        .v-enter-active,.v-leave-active{
            transition: opacity 2s;
        }
    </style>
</head>
<body>
    <div id="root">
        <transition-group>
            <div v-for='item of list' :key=item.id>{{item.title}}</div>
        </transition-group>
        <button @click=handleBtnClick>添加按钮</button>
    </div>
    <script>
        var count = 0
        var vm = new Vue({
            el:'#root',
            data:{
                list:[]
            },
            methods:{
                handleBtnClick:function(){
                    this.list.push({
                        id:count++,
                        title:'hello'+String(count)
                    })
                }
            }
        })
    </script>
</body>
</html>